1 /* Copyright 2016 Google Inc. All Rights Reserved. 2 3 Distributed under MIT license. 4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT 5 */ 6 7 /* Macros for compiler / platform specific features and build options. 8 9 Build options are: 10 * BROTLI_BUILD_32_BIT disables 64-bit optimizations 11 * BROTLI_BUILD_64_BIT forces to use 64-bit optimizations 12 * BROTLI_BUILD_BIG_ENDIAN forces to use big-endian optimizations 13 * BROTLI_BUILD_ENDIAN_NEUTRAL disables endian-aware optimizations 14 * BROTLI_BUILD_LITTLE_ENDIAN forces to use little-endian optimizations 15 * BROTLI_BUILD_PORTABLE disables dangerous optimizations, like unaligned 16 read and overlapping memcpy; this reduces decompression speed by 5% 17 * BROTLI_BUILD_NO_RBIT disables "rbit" optimization for ARM CPUs 18 * BROTLI_DEBUG dumps file name and line number when decoder detects stream 19 or memory error 20 * BROTLI_ENABLE_LOG enables asserts and dumps various state information 21 */ 22 23 #ifndef BROTLI_COMMON_PLATFORM_H_ 24 #define BROTLI_COMMON_PLATFORM_H_ 25 26 #include <string.h> /* memcpy */ 27 28 #include <brotli/port.h> 29 #include <brotli/types.h> 30 31 #if defined(OS_LINUX) || defined(OS_CYGWIN) || defined(__EMSCRIPTEN__) 32 #include <endian.h> 33 #elif defined(OS_FREEBSD) 34 #include <machine/endian.h> 35 #elif defined(OS_MACOSX) 36 #include <machine/endian.h> 37 /* Let's try and follow the Linux convention */ 38 #define BROTLI_X_BYTE_ORDER BYTE_ORDER 39 #define BROTLI_X_LITTLE_ENDIAN LITTLE_ENDIAN 40 #define BROTLI_X_BIG_ENDIAN BIG_ENDIAN 41 #endif 42 43 #if BROTLI_MSVC_VERSION_CHECK(12, 0, 0) 44 #include <intrin.h> 45 #endif 46 47 #if defined(BROTLI_ENABLE_LOG) || defined(BROTLI_DEBUG) 48 #include <assert.h> 49 #include <stdio.h> 50 #endif 51 52 /* The following macros were borrowed from https://github.com/nemequ/hedley 53 * with permission of original author - Evan Nemerson <evan (at) nemerson.com> */ 54 55 /* >>> >>> >>> hedley macros */ 56 57 /* Define "BROTLI_PREDICT_TRUE" and "BROTLI_PREDICT_FALSE" macros for capable 58 compilers. 59 60 To apply compiler hint, enclose the branching condition into macros, like this: 61 62 if (BROTLI_PREDICT_TRUE(zero == 0)) { 63 // main execution path 64 } else { 65 // compiler should place this code outside of main execution path 66 } 67 68 OR: 69 70 if (BROTLI_PREDICT_FALSE(something_rare_or_unexpected_happens)) { 71 // compiler should place this code outside of main execution path 72 } 73 74 */ 75 #if BROTLI_GNUC_HAS_BUILTIN(__builtin_expect, 3, 0, 0) || \ 76 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ 77 BROTLI_SUNPRO_VERSION_CHECK(5, 15, 0) || \ 78 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ 79 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ 80 BROTLI_TI_VERSION_CHECK(7, 3, 0) || \ 81 BROTLI_TINYC_VERSION_CHECK(0, 9, 27) 82 #define BROTLI_PREDICT_TRUE(x) (__builtin_expect(!!(x), 1)) 83 #define BROTLI_PREDICT_FALSE(x) (__builtin_expect(x, 0)) 84 #else 85 #define BROTLI_PREDICT_FALSE(x) (x) 86 #define BROTLI_PREDICT_TRUE(x) (x) 87 #endif 88 89 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && \ 90 !defined(__cplusplus) 91 #define BROTLI_RESTRICT restrict 92 #elif BROTLI_GNUC_VERSION_CHECK(3, 1, 0) || \ 93 BROTLI_MSVC_VERSION_CHECK(14, 0, 0) || \ 94 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ 95 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ 96 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ 97 BROTLI_PGI_VERSION_CHECK(17, 10, 0) || \ 98 BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ 99 BROTLI_IAR_VERSION_CHECK(8, 0, 0) || \ 100 (BROTLI_SUNPRO_VERSION_CHECK(5, 14, 0) && defined(__cplusplus)) 101 #define BROTLI_RESTRICT __restrict 102 #elif BROTLI_SUNPRO_VERSION_CHECK(5, 3, 0) && !defined(__cplusplus) 103 #define BROTLI_RESTRICT _Restrict 104 #else 105 #define BROTLI_RESTRICT 106 #endif 107 108 #if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) || \ 109 (defined(__cplusplus) && (__cplusplus >= 199711L)) 110 #define BROTLI_MAYBE_INLINE inline 111 #elif defined(__GNUC_STDC_INLINE__) || defined(__GNUC_GNU_INLINE__) || \ 112 BROTLI_ARM_VERSION_CHECK(6, 2, 0) 113 #define BROTLI_MAYBE_INLINE __inline__ 114 #elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) || \ 115 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || BROTLI_TI_VERSION_CHECK(8, 0, 0) 116 #define BROTLI_MAYBE_INLINE __inline 117 #else 118 #define BROTLI_MAYBE_INLINE 119 #endif 120 121 #if BROTLI_GNUC_HAS_ATTRIBUTE(always_inline, 4, 0, 0) || \ 122 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ 123 BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ 124 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ 125 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ 126 BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ 127 (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) 128 #define BROTLI_INLINE BROTLI_MAYBE_INLINE __attribute__((__always_inline__)) 129 #elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) 130 #define BROTLI_INLINE BROTLI_MAYBE_INLINE __forceinline 131 #elif BROTLI_TI_VERSION_CHECK(7, 0, 0) && defined(__cplusplus) 132 #define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("FUNC_ALWAYS_INLINE;") 133 #elif BROTLI_IAR_VERSION_CHECK(8, 0, 0) 134 #define BROTLI_INLINE BROTLI_MAYBE_INLINE _Pragma("inline=forced") 135 #else 136 #define BROTLI_INLINE BROTLI_MAYBE_INLINE 137 #endif 138 139 #if BROTLI_GNUC_HAS_ATTRIBUTE(noinline, 4, 0, 0) || \ 140 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ 141 BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ 142 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ 143 BROTLI_IBM_VERSION_CHECK(10, 1, 0) || \ 144 BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ 145 (BROTLI_TI_VERSION_CHECK(7, 3, 0) && defined(__TI_GNU_ATTRIBUTE_SUPPORT__)) 146 #define BROTLI_NOINLINE __attribute__((__noinline__)) 147 #elif BROTLI_MSVC_VERSION_CHECK(13, 10, 0) 148 #define BROTLI_NOINLINE __declspec(noinline) 149 #elif BROTLI_PGI_VERSION_CHECK(10, 2, 0) 150 #define BROTLI_NOINLINE _Pragma("noinline") 151 #elif BROTLI_TI_VERSION_CHECK(6, 0, 0) && defined(__cplusplus) 152 #define BROTLI_NOINLINE _Pragma("FUNC_CANNOT_INLINE;") 153 #elif BROTLI_IAR_VERSION_CHECK(8, 0, 0) 154 #define BROTLI_NOINLINE _Pragma("inline=never") 155 #else 156 #define BROTLI_NOINLINE 157 #endif 158 159 /* BROTLI_INTERNAL could be defined to override visibility, e.g. for tests. */ 160 #if !defined(BROTLI_INTERNAL) 161 #if defined(_WIN32) || defined(__CYGWIN__) 162 #define BROTLI_INTERNAL 163 #elif BROTLI_GNUC_VERSION_CHECK(3, 3, 0) || \ 164 BROTLI_TI_VERSION_CHECK(8, 0, 0) || \ 165 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) || \ 166 BROTLI_ARM_VERSION_CHECK(4, 1, 0) || \ 167 BROTLI_IBM_VERSION_CHECK(13, 1, 0) || \ 168 BROTLI_SUNPRO_VERSION_CHECK(5, 11, 0) || \ 169 (BROTLI_TI_VERSION_CHECK(7, 3, 0) && \ 170 defined(__TI_GNU_ATTRIBUTE_SUPPORT__) && defined(__TI_EABI__)) 171 #define BROTLI_INTERNAL __attribute__ ((visibility ("hidden"))) 172 #else 173 #define BROTLI_INTERNAL 174 #endif 175 #endif 176 177 /* <<< <<< <<< end of hedley macros. */ 178 179 #if BROTLI_GNUC_HAS_ATTRIBUTE(unused, 2, 7, 0) || \ 180 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) 181 #define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE __attribute__ ((unused)) 182 #else 183 #define BROTLI_UNUSED_FUNCTION static BROTLI_INLINE 184 #endif 185 186 #if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) 187 #define BROTLI_ALIGNED(N) __attribute__((aligned(N))) 188 #else 189 #define BROTLI_ALIGNED(N) 190 #endif 191 192 #if (defined(__ARM_ARCH) && (__ARM_ARCH == 7)) || \ 193 (defined(M_ARM) && (M_ARM == 7)) 194 #define BROTLI_TARGET_ARMV7 195 #endif /* ARMv7 */ 196 197 #if (defined(__ARM_ARCH) && (__ARM_ARCH == 8)) || \ 198 defined(__aarch64__) || defined(__ARM64_ARCH_8__) 199 #define BROTLI_TARGET_ARMV8_ANY 200 201 #if defined(__ARM_32BIT_STATE) 202 #define BROTLI_TARGET_ARMV8_32 203 #elif defined(__ARM_64BIT_STATE) 204 #define BROTLI_TARGET_ARMV8_64 205 #endif 206 207 #endif /* ARMv8 */ 208 209 #if defined(__ARM_NEON__) || defined(__ARM_NEON) 210 #define BROTLI_TARGET_NEON 211 #endif 212 213 #if defined(__i386) || defined(_M_IX86) 214 #define BROTLI_TARGET_X86 215 #endif 216 217 #if defined(__x86_64__) || defined(_M_X64) 218 #define BROTLI_TARGET_X64 219 #endif 220 221 #if defined(__PPC64__) 222 #define BROTLI_TARGET_POWERPC64 223 #endif 224 225 #if defined(__riscv) && defined(__riscv_xlen) && __riscv_xlen == 64 226 #define BROTLI_TARGET_RISCV64 227 #endif 228 229 #if defined(BROTLI_BUILD_64_BIT) 230 #define BROTLI_64_BITS 1 231 #elif defined(BROTLI_BUILD_32_BIT) 232 #define BROTLI_64_BITS 0 233 #elif defined(BROTLI_TARGET_X64) || defined(BROTLI_TARGET_ARMV8_64) || \ 234 defined(BROTLI_TARGET_POWERPC64) || defined(BROTLI_TARGET_RISCV64) 235 #define BROTLI_64_BITS 1 236 #else 237 #define BROTLI_64_BITS 0 238 #endif 239 240 #if (BROTLI_64_BITS) 241 #define brotli_reg_t uint64_t 242 #else 243 #define brotli_reg_t uint32_t 244 #endif 245 246 #if defined(BROTLI_BUILD_BIG_ENDIAN) 247 #define BROTLI_BIG_ENDIAN 1 248 #elif defined(BROTLI_BUILD_LITTLE_ENDIAN) 249 #define BROTLI_LITTLE_ENDIAN 1 250 #elif defined(BROTLI_BUILD_ENDIAN_NEUTRAL) 251 /* Just break elif chain. */ 252 #elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) 253 #define BROTLI_LITTLE_ENDIAN 1 254 #elif defined(_WIN32) || defined(BROTLI_TARGET_X64) 255 /* Win32 & x64 can currently always be assumed to be little endian */ 256 #define BROTLI_LITTLE_ENDIAN 1 257 #elif defined(__BYTE_ORDER__) && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) 258 #define BROTLI_BIG_ENDIAN 1 259 #elif defined(BROTLI_X_BYTE_ORDER) 260 #if BROTLI_X_BYTE_ORDER == BROTLI_X_LITTLE_ENDIAN 261 #define BROTLI_LITTLE_ENDIAN 1 262 #elif BROTLI_X_BYTE_ORDER == BROTLI_X_BIG_ENDIAN 263 #define BROTLI_BIG_ENDIAN 1 264 #endif 265 #endif /* BROTLI_X_BYTE_ORDER */ 266 267 #if !defined(BROTLI_LITTLE_ENDIAN) 268 #define BROTLI_LITTLE_ENDIAN 0 269 #endif 270 271 #if !defined(BROTLI_BIG_ENDIAN) 272 #define BROTLI_BIG_ENDIAN 0 273 #endif 274 275 #if defined(BROTLI_X_BYTE_ORDER) 276 #undef BROTLI_X_BYTE_ORDER 277 #undef BROTLI_X_LITTLE_ENDIAN 278 #undef BROTLI_X_BIG_ENDIAN 279 #endif 280 281 #if defined(BROTLI_BUILD_PORTABLE) 282 #define BROTLI_ALIGNED_READ (!!1) 283 #elif defined(BROTLI_TARGET_X86) || defined(BROTLI_TARGET_X64) || \ 284 defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) || \ 285 defined(BROTLI_TARGET_RISCV64) 286 /* Allow unaligned read only for white-listed CPUs. */ 287 #define BROTLI_ALIGNED_READ (!!0) 288 #else 289 #define BROTLI_ALIGNED_READ (!!1) 290 #endif 291 292 #if BROTLI_ALIGNED_READ 293 /* Portable unaligned memory access: read / write values via memcpy. */ 294 static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) { 295 uint16_t t; 296 memcpy(&t, p, sizeof t); 297 return t; 298 } 299 static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) { 300 uint32_t t; 301 memcpy(&t, p, sizeof t); 302 return t; 303 } 304 static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { 305 uint64_t t; 306 memcpy(&t, p, sizeof t); 307 return t; 308 } 309 static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { 310 memcpy(p, &v, sizeof v); 311 } 312 #else /* BROTLI_ALIGNED_READ */ 313 /* Unaligned memory access is allowed: just cast pointer to requested type. */ 314 #if BROTLI_SANITIZED 315 /* Consider we have an unaligned load/store of 4 bytes from address 0x...05. 316 AddressSanitizer will treat it as a 3-byte access to the range 05:07 and 317 will miss a bug if 08 is the first unaddressable byte. 318 ThreadSanitizer will also treat this as a 3-byte access to 05:07 and will 319 miss a race between this access and some other accesses to 08. 320 MemorySanitizer will correctly propagate the shadow on unaligned stores 321 and correctly report bugs on unaligned loads, but it may not properly 322 update and report the origin of the uninitialized memory. 323 For all three tools, replacing an unaligned access with a tool-specific 324 callback solves the problem. */ 325 #if defined(__cplusplus) 326 extern "C" { 327 #endif /* __cplusplus */ 328 uint16_t __sanitizer_unaligned_load16(const void* p); 329 uint32_t __sanitizer_unaligned_load32(const void* p); 330 uint64_t __sanitizer_unaligned_load64(const void* p); 331 void __sanitizer_unaligned_store64(void* p, uint64_t v); 332 #if defined(__cplusplus) 333 } /* extern "C" */ 334 #endif /* __cplusplus */ 335 #define BrotliUnalignedRead16 __sanitizer_unaligned_load16 336 #define BrotliUnalignedRead32 __sanitizer_unaligned_load32 337 #define BrotliUnalignedRead64 __sanitizer_unaligned_load64 338 #define BrotliUnalignedWrite64 __sanitizer_unaligned_store64 339 #else /* BROTLI_SANITIZED */ 340 static BROTLI_INLINE uint16_t BrotliUnalignedRead16(const void* p) { 341 return *(const uint16_t*)p; 342 } 343 static BROTLI_INLINE uint32_t BrotliUnalignedRead32(const void* p) { 344 return *(const uint32_t*)p; 345 } 346 #if (BROTLI_64_BITS) 347 static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { 348 return *(const uint64_t*)p; 349 } 350 static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { 351 *(uint64_t*)p = v; 352 } 353 #else /* BROTLI_64_BITS */ 354 /* Avoid emitting LDRD / STRD, which require properly aligned address. */ 355 /* If __attribute__(aligned) is available, use that. Otherwise, memcpy. */ 356 357 #if BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) 358 typedef BROTLI_ALIGNED(1) uint64_t brotli_unaligned_uint64_t; 359 360 static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { 361 return (uint64_t) ((const brotli_unaligned_uint64_t*) p)[0]; 362 } 363 static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { 364 brotli_unaligned_uint64_t* dwords = (brotli_unaligned_uint64_t*) p; 365 dwords[0] = (brotli_unaligned_uint64_t) v; 366 } 367 #else /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */ 368 static BROTLI_INLINE uint64_t BrotliUnalignedRead64(const void* p) { 369 uint64_t v; 370 memcpy(&v, p, sizeof(uint64_t)); 371 return v; 372 } 373 374 static BROTLI_INLINE void BrotliUnalignedWrite64(void* p, uint64_t v) { 375 memcpy(p, &v, sizeof(uint64_t)); 376 } 377 #endif /* BROTLI_GNUC_HAS_ATTRIBUTE(aligned, 2, 7, 0) */ 378 #endif /* BROTLI_64_BITS */ 379 #endif /* BROTLI_SANITIZED */ 380 #endif /* BROTLI_ALIGNED_READ */ 381 382 #if BROTLI_LITTLE_ENDIAN 383 /* Straight endianness. Just read / write values. */ 384 #define BROTLI_UNALIGNED_LOAD16LE BrotliUnalignedRead16 385 #define BROTLI_UNALIGNED_LOAD32LE BrotliUnalignedRead32 386 #define BROTLI_UNALIGNED_LOAD64LE BrotliUnalignedRead64 387 #define BROTLI_UNALIGNED_STORE64LE BrotliUnalignedWrite64 388 #elif BROTLI_BIG_ENDIAN /* BROTLI_LITTLE_ENDIAN */ 389 /* Explain compiler to byte-swap values. */ 390 #define BROTLI_BSWAP16_(V) ((uint16_t)( \ 391 (((V) & 0xFFU) << 8) | \ 392 (((V) >> 8) & 0xFFU))) 393 static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) { 394 uint16_t value = BrotliUnalignedRead16(p); 395 return BROTLI_BSWAP16_(value); 396 } 397 #define BROTLI_BSWAP32_(V) ( \ 398 (((V) & 0xFFU) << 24) | (((V) & 0xFF00U) << 8) | \ 399 (((V) >> 8) & 0xFF00U) | (((V) >> 24) & 0xFFU)) 400 static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) { 401 uint32_t value = BrotliUnalignedRead32(p); 402 return BROTLI_BSWAP32_(value); 403 } 404 #define BROTLI_BSWAP64_(V) ( \ 405 (((V) & 0xFFU) << 56) | (((V) & 0xFF00U) << 40) | \ 406 (((V) & 0xFF0000U) << 24) | (((V) & 0xFF000000U) << 8) | \ 407 (((V) >> 8) & 0xFF000000U) | (((V) >> 24) & 0xFF0000U) | \ 408 (((V) >> 40) & 0xFF00U) | (((V) >> 56) & 0xFFU)) 409 static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) { 410 uint64_t value = BrotliUnalignedRead64(p); 411 return BROTLI_BSWAP64_(value); 412 } 413 static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) { 414 uint64_t value = BROTLI_BSWAP64_(v); 415 BrotliUnalignedWrite64(p, value); 416 } 417 #else /* BROTLI_LITTLE_ENDIAN */ 418 /* Read / store values byte-wise; hopefully compiler will understand. */ 419 static BROTLI_INLINE uint16_t BROTLI_UNALIGNED_LOAD16LE(const void* p) { 420 const uint8_t* in = (const uint8_t*)p; 421 return (uint16_t)(in[0] | (in[1] << 8)); 422 } 423 static BROTLI_INLINE uint32_t BROTLI_UNALIGNED_LOAD32LE(const void* p) { 424 const uint8_t* in = (const uint8_t*)p; 425 uint32_t value = (uint32_t)(in[0]); 426 value |= (uint32_t)(in[1]) << 8; 427 value |= (uint32_t)(in[2]) << 16; 428 value |= (uint32_t)(in[3]) << 24; 429 return value; 430 } 431 static BROTLI_INLINE uint64_t BROTLI_UNALIGNED_LOAD64LE(const void* p) { 432 const uint8_t* in = (const uint8_t*)p; 433 uint64_t value = (uint64_t)(in[0]); 434 value |= (uint64_t)(in[1]) << 8; 435 value |= (uint64_t)(in[2]) << 16; 436 value |= (uint64_t)(in[3]) << 24; 437 value |= (uint64_t)(in[4]) << 32; 438 value |= (uint64_t)(in[5]) << 40; 439 value |= (uint64_t)(in[6]) << 48; 440 value |= (uint64_t)(in[7]) << 56; 441 return value; 442 } 443 static BROTLI_INLINE void BROTLI_UNALIGNED_STORE64LE(void* p, uint64_t v) { 444 uint8_t* out = (uint8_t*)p; 445 out[0] = (uint8_t)v; 446 out[1] = (uint8_t)(v >> 8); 447 out[2] = (uint8_t)(v >> 16); 448 out[3] = (uint8_t)(v >> 24); 449 out[4] = (uint8_t)(v >> 32); 450 out[5] = (uint8_t)(v >> 40); 451 out[6] = (uint8_t)(v >> 48); 452 out[7] = (uint8_t)(v >> 56); 453 } 454 #endif /* BROTLI_LITTLE_ENDIAN */ 455 456 /* BROTLI_IS_CONSTANT macros returns true for compile-time constants. */ 457 #if BROTLI_GNUC_HAS_BUILTIN(__builtin_constant_p, 3, 0, 1) || \ 458 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) 459 #define BROTLI_IS_CONSTANT(x) (!!__builtin_constant_p(x)) 460 #else 461 #define BROTLI_IS_CONSTANT(x) (!!0) 462 #endif 463 464 #if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) 465 #define BROTLI_HAS_UBFX (!!1) 466 #else 467 #define BROTLI_HAS_UBFX (!!0) 468 #endif 469 470 #if defined(BROTLI_ENABLE_LOG) 471 #define BROTLI_LOG(x) printf x 472 #else 473 #define BROTLI_LOG(x) 474 #endif 475 476 #if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG) 477 #define BROTLI_DCHECK(x) assert(x) 478 static BROTLI_INLINE void BrotliDump(const char* f, int l, const char* fn) { 479 fprintf(stderr, "%s:%d (%s)\n", f, l, fn); 480 fflush(stderr); 481 } 482 #define BROTLI_DUMP() BrotliDump(__FILE__, __LINE__, __FUNCTION__) 483 #else 484 #define BROTLI_DCHECK(x) 485 #define BROTLI_DUMP() (void)(0) 486 #endif 487 488 /* TODO: add appropriate icc/sunpro/arm/ibm/ti checks. */ 489 #if (BROTLI_GNUC_VERSION_CHECK(3, 0, 0) || defined(__llvm__)) && \ 490 !defined(BROTLI_BUILD_NO_RBIT) 491 #if defined(BROTLI_TARGET_ARMV7) || defined(BROTLI_TARGET_ARMV8_ANY) 492 /* TODO: detect ARMv6T2 and enable this code for it. */ 493 static BROTLI_INLINE brotli_reg_t BrotliRBit(brotli_reg_t input) { 494 brotli_reg_t output; 495 __asm__("rbit %0, %1\n" : "=r"(output) : "r"(input)); 496 return output; 497 } 498 #define BROTLI_RBIT(x) BrotliRBit(x) 499 #endif /* armv7 / armv8 */ 500 #endif /* gcc || clang */ 501 #if !defined(BROTLI_RBIT) 502 static BROTLI_INLINE void BrotliRBit(void) { /* Should break build if used. */ } 503 #endif /* BROTLI_RBIT */ 504 505 #define BROTLI_REPEAT(N, X) { \ 506 if ((N & 1) != 0) {X;} \ 507 if ((N & 2) != 0) {X; X;} \ 508 if ((N & 4) != 0) {X; X; X; X;} \ 509 } 510 511 #define BROTLI_UNUSED(X) (void)(X) 512 513 #define BROTLI_MIN_MAX(T) \ 514 static BROTLI_INLINE T brotli_min_ ## T (T a, T b) { return a < b ? a : b; } \ 515 static BROTLI_INLINE T brotli_max_ ## T (T a, T b) { return a > b ? a : b; } 516 BROTLI_MIN_MAX(double) BROTLI_MIN_MAX(float) BROTLI_MIN_MAX(int) 517 BROTLI_MIN_MAX(size_t) BROTLI_MIN_MAX(uint32_t) BROTLI_MIN_MAX(uint8_t) 518 #undef BROTLI_MIN_MAX 519 #define BROTLI_MIN(T, A, B) (brotli_min_ ## T((A), (B))) 520 #define BROTLI_MAX(T, A, B) (brotli_max_ ## T((A), (B))) 521 522 #define BROTLI_SWAP(T, A, I, J) { \ 523 T __brotli_swap_tmp = (A)[(I)]; \ 524 (A)[(I)] = (A)[(J)]; \ 525 (A)[(J)] = __brotli_swap_tmp; \ 526 } 527 528 #if BROTLI_64_BITS 529 #if BROTLI_GNUC_HAS_BUILTIN(__builtin_ctzll, 3, 4, 0) || \ 530 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) 531 #define BROTLI_TZCNT64 __builtin_ctzll 532 #elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) 533 #if defined(BROTLI_TARGET_X64) 534 #define BROTLI_TZCNT64 _tzcnt_u64 535 #else /* BROTLI_TARGET_X64 */ 536 static BROTLI_INLINE uint32_t BrotliBsf64Msvc(uint64_t x) { 537 uint32_t lsb; 538 _BitScanForward64(&lsb, x); 539 return lsb; 540 } 541 #define BROTLI_TZCNT64 BrotliBsf64Msvc 542 #endif /* BROTLI_TARGET_X64 */ 543 #endif /* __builtin_ctzll */ 544 #endif /* BROTLI_64_BITS */ 545 546 #if BROTLI_GNUC_HAS_BUILTIN(__builtin_clz, 3, 4, 0) || \ 547 BROTLI_INTEL_VERSION_CHECK(16, 0, 0) 548 #define BROTLI_BSR32(x) (31u ^ (uint32_t)__builtin_clz(x)) 549 #elif BROTLI_MSVC_VERSION_CHECK(12, 0, 0) 550 static BROTLI_INLINE uint32_t BrotliBsr32Msvc(uint32_t x) { 551 unsigned long msb; 552 _BitScanReverse(&msb, x); 553 return (uint32_t)msb; 554 } 555 #define BROTLI_BSR32 BrotliBsr32Msvc 556 #endif /* __builtin_clz */ 557 558 /* Default brotli_alloc_func */ 559 BROTLI_COMMON_API void* BrotliDefaultAllocFunc(void* opaque, size_t size); 560 561 /* Default brotli_free_func */ 562 BROTLI_COMMON_API void BrotliDefaultFreeFunc(void* opaque, void* address); 563 564 BROTLI_UNUSED_FUNCTION void BrotliSuppressUnusedFunctions(void) { 565 BROTLI_UNUSED(&BrotliSuppressUnusedFunctions); 566 BROTLI_UNUSED(&BrotliUnalignedRead16); 567 BROTLI_UNUSED(&BrotliUnalignedRead32); 568 BROTLI_UNUSED(&BrotliUnalignedRead64); 569 BROTLI_UNUSED(&BrotliUnalignedWrite64); 570 BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD16LE); 571 BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD32LE); 572 BROTLI_UNUSED(&BROTLI_UNALIGNED_LOAD64LE); 573 BROTLI_UNUSED(&BROTLI_UNALIGNED_STORE64LE); 574 BROTLI_UNUSED(&BrotliRBit); 575 BROTLI_UNUSED(&brotli_min_double); 576 BROTLI_UNUSED(&brotli_max_double); 577 BROTLI_UNUSED(&brotli_min_float); 578 BROTLI_UNUSED(&brotli_max_float); 579 BROTLI_UNUSED(&brotli_min_int); 580 BROTLI_UNUSED(&brotli_max_int); 581 BROTLI_UNUSED(&brotli_min_size_t); 582 BROTLI_UNUSED(&brotli_max_size_t); 583 BROTLI_UNUSED(&brotli_min_uint32_t); 584 BROTLI_UNUSED(&brotli_max_uint32_t); 585 BROTLI_UNUSED(&brotli_min_uint8_t); 586 BROTLI_UNUSED(&brotli_max_uint8_t); 587 BROTLI_UNUSED(&BrotliDefaultAllocFunc); 588 BROTLI_UNUSED(&BrotliDefaultFreeFunc); 589 #if defined(BROTLI_DEBUG) || defined(BROTLI_ENABLE_LOG) 590 BROTLI_UNUSED(&BrotliDump); 591 #endif 592 } 593 594 #endif /* BROTLI_COMMON_PLATFORM_H_ */ 595
Indexes created Fri Jul 03 00:25:33 UTC 2026